#version 450
#extension GL_ARB_separate_shader_objects : enable

layout(location = 0) in vec2 inTexCoord;
layout(location = 1) in vec4 inVertexColor;

layout(location = 0) out vec4 outColor;

layout(set = 2, binding = 0) uniform sampler2D texSampler;
layout(set = 3, binding = 0) uniform UniformBufferObject {
    bool flippedH;
    bool flippedV;
    vec2 uvOffset;
    vec4 colorOverlay;
} ubo;

void main()
{
    vec2 uv = inTexCoord;
    uv += ubo.uvOffset;
    if(ubo.flippedH) uv.x = 1.0 - uv.x;
    if(ubo.flippedV) uv.y = 1.0 - uv.y;
    outColor = texture(texSampler, uv) * inVertexColor * ubo.colorOverlay;
    if(outColor.w < 0.1)
        discard;
}